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'Burban gurgles - that's normal, right?

Discussion in 'General Chevy & GM Tech Questions' started by Springthing, Sep 16, 2008.

  1. Springthing

    Springthing Epic Member 5+ Years 1000 Posts

    Mostly when I shut it off and everything is quiet. The gurgling happens behind the passenger glove box/dash. I figure it's normal gurgling but have never heard it that loud on a vehicle before. It does it while driving as well but I either don't notice it as much or it's not as pronounced.

    All normal?

  2. MrShorty

    MrShorty Epic Member Staff Member 5+ Years 1000 Posts

    I wouldn't assume all normal. Probably the first thing I'd check would be coolant level. That sound is often "air" being pumped through the heater core because the cooling system is low. This can be bad news, especially if you still have Dexcool in your system.
  3. 95CTburb19

    95CTburb19 Epic Member 5+ Years 1000 Posts

    yeah I don't know that that is normal. I never had it happen on either of my suburbans or my truck.
  4. GaryL

    GaryL Epic Member 5+ Years ROTM Winner 1000 Posts Platinum Contributor

    My 99 doesn't do it, but my dad's 94 does. Never had any issues with it.
  5. Springthing

    Springthing Epic Member 5+ Years 1000 Posts

    Well, sounds like it merits a looksee at least.

    Thanks to all!
  6. sstoner911

    sstoner911 Epic Member 5+ Years 1000 Posts

    Found this on the internet -

    "Unless the engine is overheating, you have air trapped in the system. Park the car on an incline or jack up the front as far as possible. When engine is cold, remove the radiator cap, set heater controls to hot, and start the engine. Make sure the radiator is full and watch for air escaping. Keep the coolant level full and when you see not more air bubbles escaping, you are done. Replace the radiator cap, and see if the sound goes away. If not, take it to a professional."
  7. Springthing

    Springthing Epic Member 5+ Years 1000 Posts

    Thanks! :great:
  8. collinsperformance

    collinsperformance Epic Member 5+ Years 500 Posts

    i agree--not normal. and you do have air in the system. check the level, the raditor cap is mostly to blame for this. the seal goes and it allows water to the over floe but when cooling air seaps in the cap (if the over flow is full....mike
  9. Springthing

    Springthing Epic Member 5+ Years 1000 Posts

    Well, looked it over and found that, indeed, the coolant was low - practically empty in the bottle.

    The radiator still flows well - took the cap off and, as stated, started the truck up with the cap off, heater on. I could see the coolant flowing in a nice steady stream.

    Manual states "dex-cool"... or something like that.

    Although it's probably been mentioned before - what is the general opinion on the pre-diluted 50/50 stuff?

    Thanks for all the help. My membership fee to GMTC is really paying off. Best $150.00 I've spent this year...
  10. collinsperformance

    collinsperformance Epic Member 5+ Years 500 Posts

    if the price is right then no issues. my thought is "I can add the water and get a full bottle that i paid for. mike

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